Stop motion for circular looms



Oct. 2, 1951 vss 2,569,591

STOP MOTION FOR CIRCULAR LOOMS 7 Filed June 29, 1950' INVENTOR. EDWARD VOSSEN v BY /5.5 Y

. ATTORNEY Patented Oct. 2, 1951 UNITED STATES ATE-NT orrics 'iitt'iO'n of New York Application June 29, 1950, Serial No. 171,131

7 Claims. (Cl. 139-353) This invention relates to new and useful improvements in stop motions -f or circular-looms.

This invention particularly applies to a Boyle circular loom manufactured by Zlohn Royle & Son's in Patersonfldew Jersey. Heretoiore attempts to equip these looms and other circular looms with stop motions have been unsuccessful because the revolving threads were in inaccessible places. These looms are mainly u ed to manufacture linen fire hose. They employ 288 stationary threads or which are substantially equally s aced around the fire hose bein manufactured. "and two revolving spools of yarn. The operation of the loom very 'similart'o a fiat loom because groups of the yarns or threads feeding into the looms are alternately moved up and down, and two revolving spools of thread spin around in the center of the loom laying threads of yarn in between the groups of feeding yarns similar to a shuttle in a flat loom. Because the application of a stop motion to this type of loom in the "past has not been successful it is customary for one person to watch 'two looms and stop-them whenever required. The stationary threads are provided with weights which fall down when a thread breaks, or an end appears so that aperson can hear this and immediately stop-the loo-m. it is required that the person watch the revolving two spools "of thread at the center-sci the two looms an'd consequently the per'sons hea-d turns back and forth between the two looms all day long. Quite often a break in the revolving spool threadsis not instantly detected and then the loom must 'be turned backwards until thepoint ofdamage in the hose is reached before it can be repaired andthe loom restarted. Whiletheperson is thus repairing one loom theotli'er loom must also be stopped because now it is not being watched.

This invention proposes a stop motion for these particular types of looms so that one person may be employed on a relatively large group of looms and operate them more efficiently than the heretofore .one person for two looms. For example, with the automatic stop motion device. in accordance with this invention, one personmay ,be provided with four or six looms, since if the threads of any one 100m runs afoul the loom will automatically stop.

This invention contemplates to guard both the stationary threads and the revolving threads with the stop motion.

Another object of this invention is to provide small arcuate contacts which may readily be mounted in the vicinity of; the revolving spools 2 and which may easily be engaged by a stationary contact arm so that a circuit may be completed to the revolving stop motion switches arranged to guard the revolving spools of the loom.

These looms are provided with 'arcuate thread spreading bars adjacent the revolving spools to spread the threads and make room for the revolving spools. This invention particularly proposes to mount the arcuate contacts referred to in the previous paragraph, on these 'arcuate thread spreading bars.

These circular looms are also provided with stopping mechanism which includes longitud-i nally movable control rods. It is proposed to provide a controller associated with these rods by which the rods may be operated automatically in the usual way for stopping the circular loom.

The invention also proposes a particularly simple and emcient construction of said new troller.

Another object of the invention is the construction of a stop motion as described which is simple and durable and which may be manufact-ured and sold at a reasonable :cost.

In the accompanying drawing forming terial part of this disclosure:

Fig. 1 is a fragmentary plan view of a circular loom provided with. a stop motion constructed in accordance with this invention.

Fig. 2 is a fragmentary sectional view or .portions of the stop motion device seen as though looking in the direction of the line 2-4 of Fig. l, but no part of the circular loom has been shown in this view, except for the control rod for stopping the machine.

Fig. 3 is a fragmentary enlarged plan View taken on the line 33 of Fig. 2, with a part thereof broken away to disclose interior parts.

Fig. 4 is a fragmentary perspective View of one of the arcuate contacts used in the device. I

Fig. 5 is a schematic wiring diagram of the stop motion device.

The new stop motion device, accordance with this invention, is intended for a circular loom I i! m'anuractures a fire hose or ether hose H at its center. This loom is equipped with a plurality or stationary threads 1 2 arran ed completely around the circumference of the 106m and is also provided with two revolving spools E3 of thread. These revolving spools l3 of thread are positioned immediately below revolving arcuate thread spreading bars H! which spread the threads, I2 immediately adjacent the hose H so as tog -make room for the sp'dols13. to revolve. ihe detailsof the circular loom will not be given in a mathe longitudinally movable control rod I5. One' end of this control rod 5 is provided with a handle l6 by which it is intended to be moved. An operator guarding two adjacent looms keeps one hand on each of the handles l6 and-is-ready to stop either loom, or both looms at an instants notice, by longitudinally moving eachrod I5.

The new stop motion includes a spring I! aim nected with an arm l8 which is pivotally supported at its bottom end by a pintle IS. The top end of the arm |8 pivotally connects with the rod l5. The spring I! normally urges the rod |5 into its off position, which is towards the right.

A sleeve cam or sleeve is fixedly mounted on the rod l5 and is cooperative with a controller 2|. This controller includes a normally open push button switch 22 adapted to be held closed by the sleeve 20 when said control rod I5 is in its on position. The push button switch 22 is provided with a roller operator 23 which is pushed down by a beveled end portion 24 formed on the sleeve cam 20. In Fig. 2 the dot and dash lines 20 indicate the position of the sleeve cam 20 when the controller rod I5 is in its on position.

A latch arm 26 is provided for engaging in back of the sleeve cam 20 for holding said control rod |5 in its on position. This latch arm 26 is provided with a top roller 21 which may engage behind the back end of the sleeve cam 20. The front bevel 24 is capable of depressing the roller 21 and thus pivoting the latch arm 26 downwards while the control rod I5 is moved to its on position. The latch arm 26 extends into a housing 28 which is stationarily mounted on a portion of the frame 29 of the machine. The inner end of the latch arm 26 is pivotally supported on a pivot 30 mounted within the housing 28.

The latch arm 26 is associated with solenoid control means for moving it into its releasing position. This means includes a bracket 3| attached to the arm 26 and extending downwards and provided with a horizontal pin 32. A bell crank 33 is pivotally mounted at its centerupon a pivot 34 mounted within the housing 28. The top arm of the bell crank 33 engages across the top of the pin 32. The other arm of the bell crank 33 connects with the core 36 of a solenoid 31. The arm 26 is provided with a spring bracket 38 to which a spring 39 is attached. This spring 39 has its top end connected with the top of the housing 28. It actsto normally urge the latch arm 26 upwards.

The stop motion is also provided with a relay 40 connected to operate the solenoid 31. The relay 40 has a relay coil 4| in a circuit including in series the switch 22 and the secondary 42 of a transformer 43. The primary 44 of this transformer 43 is connected with an electric circuit 45. The coil 4| is also connected with a plurality of stationary stop motion switch devices 46 and with a contact arm 4! engageable periodically with arcuate contacts 48. These contacts 48 are positioned above the threads of the circular loom and are supported on said thread spreading bars l4. Each of the arcuate contacts 48 is provided with a fork construction 49 which are adapted to straddle the spreader bars l4 and by which the arcuate contacts are mounted in position. These arcuate contacts 48 are electrically connected by the leads 50 with revolving stop motion switch devices 5| for protecting the revolving threads from the revolving spools |3 of the machine.

The relay 40 is provided with a switch section 52 controlling a circuit 53 which includes the solenoid 31. One stop motion switch device 46 is needed for each stationary thread of the loom. If the loom has 288 stationary threads then 288 of these devices are required. The stop motion switch devices 46 have their bodies grounded in the usual way and their positive terminals are connected in parallel with each other and in series with the coil 4| of the relay 40. The contact arm 47 is supported on a stationary bracket 55 mounted upon the frame 29 of the loom. This bracket 55 must be insulated from the machine so that the contact arm 41 is not short circuited. The leads 50 connect with the terminals of the revolving stop motion switch devices 5|. These switch devices 5| have their bodies grounded in the usual way.

The operation of the stop motion may be understood from the following:

The stop motion is placed into operative position by moving the control rod |5 to its on position. When this control rod I5 is so moved the sleeve cam 20 will reach the dot and dash line position 20 shown in Fig. 2, and will be held in this position by the latch arm 26. In this position the sleeve 20 engages the roller 23 and closes the push button switch 22. The circular loom is now operating. If any of the stationary threads |2 break or reach an end, one of the stationary stop motion switch devices 46 will operate to cause a current to flow through the coil 4| of the relay. Similarly, if either of the revolving threads from the revolving spools |3 break, or reach an end, one of the revolving stop motion switch devices 5| will operate to cause a current to flow through the coil 4| of the relay 40. When the coil 4| is energized the switch 52 is closed energizing the solenoid 31 which then draws in its core 36 and pivots the bell crank 33 so that the top arm of the bell crank 33 moves the pin 32 downwards and in this way pivots the latch arm 26 downwards, releasing the sleeve cam 20. Spring I! immediately moves the control rod l5 into its stop position in which the loom stops. When the control rod [5 moves towards its stop position the sleeve cam 20 will ride off of the roller 23 so that the switch 22 opens and interrupts the flow of current through the closed stop motion switch device 46, or 5| which caused the operation of the stop motion.

While I have illustrated and described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

1. In a stop motion for a circular loom having a self closing stopping mechanism and furthermore having revolving arcuate thread spreading bars to make room for the revolving spools of thread, an electric controller for releasing said stopping mechanism, stationary stop motion switch devices for protecting the stationary threads of said loom and electrically connected to actuate said controller, a stationary contact arm electrically connected with said controller and extending down into the vicinity of said spreading bars, revolving stop motion switch devices for protecting the revolving thread of said loom, and arcuate contacts electrically connected with said revolving stop motion switch devices and positioned above said threads and supported on said thread spreading bars and periodically engaging said contact arm during the revolving of said spreading bars in order to close an electric circuit to said controller for stopping said loom when any one of said revolving stop motion switch devices operates.

2. A stop motion as defined in claim 1 in which said arc ate contacts have forks straddling said spreading bars and by which they are attached to said spreading bars.

' 3. A stop motion as defined in claim 1 in which said arcuate contacts each has a fork construction by which they are supported on said thread spreading bars.

4. In a stop motion for a circular loom having a stopping mechanism including a longitudinally movable control rod, resilient means urging said control rod into an oil position, a sleeve cam on said rod, a normally open push button switch held closed by said sleeve cam when said control rod is in an on position, a latch arm for engaging in back of said sleeve cam for holding said control rod in its on position, solenoid controlled means for moving said latch arm into releasing position, a plurality of stop motion switch devices electrically connected in a series circuit with said switch, and a relay controlled by said circuit and electrically connected to operate said solenoid controlled means.

5. A stop motion as defined in claim 4, in which said sleeve cam has a beveled end cam surface.

6. A stop motion as defined in claim 4, in which a spring resiliently urges said latch arm into its latching position.

7. A stop motion as defined in claim 4, in which said solenoid controlled means comprises a leverage system connected with said latch arm and with the core of said solenoid.

EDWARD VOSSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,419,437 Bricout Apr. 22, 1947 2,535,369 Pelce Dec. 26, 1950 

